NI multisim

[glinjik]

Hi trying to simulate the schematic before I build it but can't get it to function correctly please can one of the experienced people have a look see where I'm going wrong

sorry, had to zip it msi files not allowed

[glinjik]

wow, post 83 views
schematic 27 views
zip downloaded 7 times

And not one answer.

One begins to wonder the point of being on this forum

[Benta]

wow, post 83 views
schematic 27 views
zip downloaded 7 times

And not one answer.

One begins to wonder the point of being on this forum

Perhaps your location has something to do with it.
Just sayin'

[ledtester]

wow, post 83 views
schematic 27 views
zip downloaded 7 times

And not one answer.

One begins to wonder the point of being on this forum

It would be extremely helpful if you were more specific about what the problem is. What is your test set up? What did you expect? What did you get instead?

I don't have Multisim (is there a free version?) so I can't see what your circuit looks like but in both hardware and software engineering it helps to find the simplest example which doesn't work. I would first start by using ideal components -- ideal voltage sources, op-amps, transistors. Replace sections of the circuit with their ideal equivalents. Start with a single op-amp in the control loop and add the others one by one. When the circuit works with ideal components you can start replacing them with the real-world devices.

LTspice is a freely available circuit simulator and I see a lot of people here use it. Perhaps if you provided a LTspice schematic you'd get more interest.

Updated: Also note that in some parts of the world this is Easter weekend.

[themadhippy]

Also note that this is Easter weekend

thought that was last weekend

[ledtester]

You're right! doh!

Well -- Orthodox Easter is this weekend so my brain wasn't misleading me too much!

[glinjik]

My location and politics has nothing todo with an electrical forum just saying I'm actually English but happen to live in Russia

[eugene]

Only a fraction of EEVBlog members use Multisim, so not many of us are able to load your document to try it.

[bostonman]

Can you save it as older version? I have version 12 and it won't let me load this file.

[Zero999]

wow, post 83 views
schematic 27 views
zip downloaded 7 times

And not one answer.

One begins to wonder the point of being on this forum

Most people here use LTSpice, for simulation, because it's a free download, saves files in plain text and is a very accurate simulator, with lots of features. Few are put off because of the current political situation, which is more complicated than the narrative, err I mean propaganda, pushed by the mainstream media.

[glinjik]

Can you save it as older version? I have version 12 and it won't let me load this file.

i will not get into political discussions of any type here

[glinjik]

Multisim files are not backwards compatible. For example, a file created in version 13 cannot be open in version 12 or previous, and there is no option to save files as a previous version.
 
On the other hand Multisim is forwards compatible, this means you can open older files in newer versions. For example, you can open a version 10 file in Multisim 13, regardless of the versions. Therefore it is also possible to open 14.1 files in Multisim 14.2.

The same rules apply to Ultiboard files.

[glinjik]

well i did try getting ltspice but result below

[Benta]

well i did try getting ltspice but result below

Oh dear! That's how sanctions work, though.

[Zero999]

The problem with sanctions is they harm everyone.

well i did try getting ltspice but result below

It's mirrored on filehippo. If that doesn't work. Send be a private message and I'll email it to you.
https://dl5.filehippo.com/e75/411/af79270bc868d8962259a0fe983f7089d9/LTspice_win_v17.0.22.0.exe?Expires=1650877090&Signature=8591bf0194ea6d37d6f1c4780fbf170079da119c&url=https://filehippo.com/download_ltspice/&Filename=LTspice_win_v17.0.22.0.exe

[CaptDon]

If it is a schematic of a functioning power supply why simulate it before building it? Was the schematic a ripoff of someone's working design? It sure has a shit load of parts in it. Probably has piss poor transient load response?

[glinjik]

If it is a schematic of a functioning power supply why simulate it before building it? Was the schematic a ripoff of someone's working design? It sure has a shit load of parts in it. Probably has piss poor transient load response?

No its an original from Russian forum this is its 16th version many people have built it and I also will build it but wanted to simulate it, its original name пидбп is forum is closed down now but the archive is still online you can use Google Translate

https://radioskot-ru.translate.goog/forum/3-7758-1?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=ru

[Zero999]

If it is a schematic of a functioning power supply why simulate it before building it? Was the schematic a ripoff of someone's working design? It sure has a shit load of parts in it. Probably has piss poor transient load response?

No its an original from Russian forum this is its 16th version many people have built it and I also will build it but wanted to simulate it, its original name пидбп is forum is closed down now but the archive is still online you can use Google Translate

https://radioskot-ru.translate.goog/forum/3-7758-1?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=ru

Did the link I posted above work for you?

Simulating a linear power supply can be quite tricky because there's a thermal element to the design, which can also be simulated but is tricky to get right?